yamaguchi



K. YAMAGUCHI. FORM FOR CONSTHUCTING CONCRETE WALLS.

APPLICATION FILED MAY? 1919.

1 ,3 1 8,427 Patented Oct. 14, l919.

j j j I in is i [raven/#21 K. YAMAGUCHI.

FORM FOR CONSTRUCTING CONCRETE WALLS.

APPLICATION FILED MAY7. 1919.

1,31 ,427. Patented Oct. 14,1919.

1 3 SHEETS-SHEET 2.

K. YAMAGUCHI.

FORM FOR CONSTRUCTING CONCRETE WALLS.

APPLICATION FILED MAY]. 1919.

Patented Oct-14, 1919,

3 SHEETS-SHEET 3.

KOKICHI YAMAGUCHI, OF TOKYO, JAPAN.

FORM FOR CONSTBUCTING CONCRETE WALLS.

Specification of Letters Patent.

Patented Oct. 14, 1919.

Application filed May 7, 1919. Serial No. 295,257.

To all whom it may concern:

Be it known that I, KoKIoHI YAMAGUGHI, a subject of the Empire of Japan, residing at No. 9 Iidamachi 6-Chome, Kojimachi- Ku, Tokyo, Japan, have invented new and useful Improvements in Forms for Constructing Concrete Walls, of which the following is a specification.

My invention relates to improvements 1n those forms for constructing concrete walls, in which two sets of form plates are arranged opposite to each other with a space equal to the thickness of the wall to be constructed and concrete is filled up into the space between them, and the form of this, invention is characterized by the fact that the form plates are so arranged as to form dovetailed cavities at their inner sides when they are connected at their transverse and longitudinal sides, and that the form plates at opposite sides of the wall are held together by means of holding devices, each bein provided at its ends with dovetailed mem ers to be engaged with the said cavities of the form plates, and also that the form plates and the dovetailed members can readily be removed fromthe constructed wall.

The objects of this invention are, firstly, to avoid all the defects in ordinary forms for constructing concrete walls; secondly, to provide a form which is considerably simple and easy either for separating it to parts, or uniting parts together; thirdly, to provide a form, of which the form plates and their holding members can be used repeatedly for the construction of walls of difierent size and thickness; fourthly, to construct strong walls homogeneous in ingredient and perfect at juncture; fifthly, to render the working for constructing walls as economical and expeditious as possible.

In the accompanying drawings Figures 1 to 4 illustrate the general arrangements of the form of this invention, showing the manner of uniting the outer form plate with the inner form plates, and of connecting the united ones at their transverse sides, Fig. 1 beingthe front elevation, Fig. 2 the rear elevation, Fig. 3 a side elevation, and Fi 4 the plan v1ew.

Figs. 5 to 8 s ow a holding device of form plates, Fig. 5 bein a side elevation, Fig. 6 the plan view, an Fig. 7 and Fig. 8 end elevations.

Fig. 9 is a perspective view, showing the manner of constructing concrete walls by applying the form of this invention, Fig. 10 the plan view thereof, and Fig. 11 the rear elevation of modified form plates to be used for constructing corners of walls.

Figs. 12 to 16 show several instances of the application of this form for constructing walls of various shapes.

Figs. 11 and 17 show some examples of the modified form plates to be used in these cases, and the reference characters in these figures denote the positions of the same plates in Figs. 9, 10, and Figs. 12 to 16 respectively.

The invention is illustrated in the accompanying drawings Referring to Figs. 1 to i, each of the form plates constituting the form is composed of an outer plate 1 and two inner plates 3, 3, and the outer plate having a rectangular or other suitable symmetrical shape provides a lining 2 having inclined surfaces on its transverse sides, and each of the inner plates 3, 3 has an inclined surface on one transverse side to be engaged with one of the said surfaces of the lining 2, and provides a notch 4 at each corner of the other transverse side, the said notches forming a dovetailed cavity at the juncture of the inner plates when the form plates are connected at their transverse sides and piled up at their longitudinal sides.

As shown in Figs. 1 to 3, the outer plate 1 and the inner plates 3, 3 are to be united together so as to form rabbetings at the top and bottom sides of the united one, said rabbetings constituting the rabbeted joints of the form plates when the latter are piled up longitudinally.

Referring to Figs. 5 to 8, the holding device in this invention is composed of two dovetailed members which are to be engaged with the said dovetailed cavities of the form plates, and a wire rod which connects the dovetailed members.

In the dovetailed member, a box 9 having rectangular section has its width tapered inwardly so as to form a dovetailed sectional plan, and has its thickness equal to that of the inner plate 3, so that the box can be engaged with the said dovetailed cavity at the inner plates 3, 3, and at the bottom of this box is fitted a short tube 10 which is of a truncated circular cone shape,

and is provided with a hole at the center f its bottom.

A long nut 11 with a flanged portion 14 is provided through the guide plate 12 of the box 9 and the ide plate 13 of the short tube 10. The w1re rod 15 of a suitable length is provided at its ends with screw threaded portions each of which is inserted in the dovetailed member and engaged with the long nut 11, so that the form plate holdin device, thus constructed, can be freely ad usted in length.

The working for constructing concrete walls by the application of the form of this invention is as follows At both sides of the position of concrete walls to be constructed, a number of the combined inner and outer .plates are connected at their transverse sides in turn by means of the ti hteners 7, and the plugs 8 are applied to t e crossed junctures of the said plates, the dovetailed cavities formed of the notches 4, 4 of two adjacent inner plates facing each other at the opposite sides of the wall to be constructed.

Each holding device being adjusted in length to correspond to the thlckness of the wall, is applied on the upper sides of the series of form plates so as each dovetailed box 9 will engage with each dovetailed cavity of the inner plates 3 at both sides of wall to be constructed, an upper portion of each dovetailed member of holding devices being exposed above the level of the inner plates.

The above-mentioned working is continued until the series of the form plates attain the whole length of the wall required.

Then, another series of the form plates is piled up on the first series of the same by engaging the bottom rabbeting of the second series with the top rabbeting of the first series so as to form the rabbeted joints of the two series of form plates, at the same time, the dovetailed cavities at the bottom of the second series are engaged with the said exposed portions of the dovetailed members of holding devices respectively, thus each holding device serves to hold not only the two sets of form plates at the opposite sides of the wall but also the two adjacent upper and lower series of form plates. And then, the holding devices are applied on the second series of form plates in like manner as on the first series.

In such a manner as described above, two or three zones of the series of form plates are piled up longitudinally, and concrete is filled up into .the Space of the form thus constructed.

When the concrete is solidified, the form is to be removed from the concrete wall, and in this case, the wedges 6 and tighteners 7 are detached respectively, so that the outer l t a d inner nlates are readily separated and respectively removed from the wall. At this time, as the dovetailed members of each holding device are exposed out of the surfaces of front and rear sides of the concrete wall, the long nuts 11 can be screwed back and separated from the wire rods 15, and also the dovetailed members of each holding device can be readily taken out from the concrete wall, because only the lower portions of the truncated circular cones of the dovetailed members are buried within the wall.

Each of the wire rods which have been left within the concrete wall being a little shorter in its length than the thickness of the wall, the wire rods do never expose themselves out of the surfaces of both sides of the wall, therefore, if the spaces previously occupied by the lower portions of the truncated circular cones are filled with cement mortar, any trace will not remain on the surface ofthe concrete wall.

Thus, when the concrete is solidified some lower zones of the series of form plates at both sides of the wall are readily removed, and the same form plates are again piled up to form the upper zones, and the working above-mentioned is to be re eated until the required height of the wall is obtained.

In such a case as a wall plate ofstone or artificial stone is to'be permanently set at one side of the concrete wall, a number of dovetailed cavities are previously formed on the interior of this wall plate at the positions corresponding to the cavities of the form plates respectively, and a dovetailed member made of artificial stone is applied to one end of each of the wire rods of each holding device, while the other end of the same is provided with the original dovetailed member.

Furthermore, this invention can be applied for constructing not only straight walls but also any other walls and columns of various shapes, by using some modified form plates at the corners of walls or column, as shown in Figs. 9, 10, and Figs. 12 to 16.

The following are the essential advantages to be effected by this invention:

1. Either to take the form apart, or to construct the parts into the form is very simple and easy.

2. The same form plates and their holding members, except the Wire rod, can be used repeatedly for several walls of different size and thickness.

3. Owing to the close connections and perfect j uncture of the form plates, the leakage of water and flowing of cement can be absolutely prevented.

4. Owing to the comparatively low height of each zone of the series of form plates, it is most convenient to stir and pound the concret therein, so that the air included in the concrete can be entirely excluded therefrom, whereby the homogeneousness of ingredients at all parts of the wall can be effected.

5 After all, the concrete Wall can be constructed very strong, and most economically and expeditiously.

I claim 1. A form for constructing concrete walls, wherein each form plate is composed of an outer plate and two inner plates combined attachably and detachably, and provides a notch at each corner of its sides, each group of the said notches forming a dovetailed cavity at the juncture of the inner plates when the form plates are transversely connected and longitudinally piled up, and each holding device which is to hold the form plates at the opposite sides of the wall to be constructed provides at its ends dovetailed members to be engaged with the said cavities of the form plates, substantially as described, for the purposes as set forth.

2. A form for constructing concrete walls, wherein each form plate is composed of an outer plate and two inner plates combined attachably and detachably, and rovides rabbetings at its top and bottom si es so as to form rabbeted joints of the form plates to be piled u longitudinally, and also provides a note at each corner of its sldes, each group of the said notches forming a dovetailed cavity at the juncture of the inner plates when the form plates are transversely connected and longitudinally piled up, and each holding device which is to hold the form plates at the opposite sides of the wall to be constructed is composed of a wire rod and two dovetailed members connected by the wire rod, eachrdovetailed member being constructed so as to be exactly engaged with each of the said cavities of the form plates and readil separated from the wire rod, substantial y as described, for the purposes as set forth.

3. A form for constructing concrete walls, wherein each form plate is composed of an outer plate and two inner plates combined attachably and detachably, and rovides rabbetings at its top and bottom si es so as to form rabbeted joints of the form plates to be piled up longitudinally, and also provides a notch at each corner of its sides, the said outer plate providing a lining havin inclined surfaces on its transverse sides, an each of the said inner plates having an inclined surface on one transverse side to be engaged with one of the said surfaces of the linlng, each roup of the said notches forming a dovetai ed cavity at the juncture of the inner plates when the form p ates are transverselv connected and longitudinally piled up, and each holding device which is to hold the formplates at the opposite sides of the wall to be constructed is composed of a wire rod and two dovetailed members connected by the wire rod, each dovetailed member being constructed so as to be exactly engaged with one of the said cavities of the form plates and readily separated from the wire rod, and the said wire rod providing at its each end a screw threaded portion to be engaged with a long nut arranged in each dovetailed member, substantially as described, for the purposes as set forth.

4:. A form for constructing concrete walls, wherein each form plate is composed of an outer plate and two inner plates combined attachably and detachably, and provides a notch at each corner of its sides, each group of the said notches forming a dovetailed cavity at the juncture of the inner plates when the form plates are transversely connected and longitudinally piled up, and each form plates holding device provides at its ends dovetailed members, one of which engaging with the said cavity of the form plates and the other one made of artificial stone engaging with one of the cavities formed on the interior of a wall plate of stone or artificial stone which is to be permanently set at one side of the concrete wall, substangially as described, for the purposes as set ort 5. A form for constructing concrete walls, wherein each form plat is composed of an outer plate and two inner plates combined attachably and detachably, and rovides rabbetings at its top and bottom si es so as 'to form rabbeted joints of the form plates to be piled up longitudinally, and also provides a notch at each corner of its sides, each grou of the said notches forming a dovetaile cavity at the juncture of inner plates when the form plates are transverselyconnected and longitudinally piled up, and each form plates holding device provides at its ends dovetailed members, one of which engaging with the said cavit of the form plates and the other one ma e of artificial stone engaging with one of the cavities formed on the interior of a wall plate of stone or artificial stone which is to be permanently set at one side of the concrete wall, substantially as described, for the purposes as set forth.

In testimony whereof I have aflixed my signature in presence of two witnesses.

KOKICHI YAMAGUCHI.

Witnesses DEN Klno, Ersnmo Ann. 

